You start off w/ a zoomed out map of the US, you can zoom in and it streams you the images of the streets as it generates them. That's a neat trick, but the part that's really impressive is when you search for something.
You can search for a location either by name or address, and it will add relative spots to the map. The slick part is that if you click on the tear-drop shaped icon it'll center the map to that location and pop up a window telling you all about that place. Address, phone number, and even a URL if available.
And of course you can spell it wrong, and autocorrect helps you out.
Once again, all praise Google. May they crush their enemies into tiny bits.